app/res/values/themers/themes.xml
<item name="android:navigationBarColor">@android:color/transparent</item>
<item name="android:windowFullscreen">true</item>
<item name="android:windowDrawsSystemBarBackgrounds">true</item>
MyActivity.kt
override fun onCreate(savedInstanceState: Bundle?) {
if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
window.setFlags(
WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,
WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS
)
}
}